Single block for hoisting-tackle



(N 0-Model.) Y J. D. SWAGIOK.

SINGLE BLOCK FOR HOISTING TAOKLE.

No. 538,294. Patented Apr. 30,- 1895.

mfzwzssz's I 12v VEJVIOE .zlthrney UNITED STATES PATENT OEEIGE.

JUDSON D. SWAOIOK, OF CANTON, OHIO.

SINGLE BLOCK FOR HOISTING-TACKLE.

SPECIFICATION forming part of Letters Patent No. 538,294, dated April30, 1895.

Application filed June 18, 189d.

To all whom iv may concern:

Be it known that I, J UDSON D. SWAOIGK, a citizen of the United States,and a resident of Canton, county of Stark, State of Ohio, have inventeda new and useful Improvement in Single Blocks for Hoisting-Tackle, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, making part of thisspecification.

My invention relates to an improvement in single blocks for hoistingtackle, and consists of certain features of construction and combinationof parts as will be hereinafter delates to the construction andadaptation of the swivel ring 0, which is preferably made of malleablecast iron, and is of the form shown, having a head or flanged portion a,a neck portion b, having an inclined face 0 in which is provided anelongated socket 0 opening upward into the ring. At the end portion ofthe open ring, is provided a tenon d, and inclined faces 01 d, the tenonadapted for insertion into the socket c and the inclined faces 01 dadapted to engage the inclined face 0 in the neck d. The shell for thepurposes of this case, is simply a yoke or U plate B, having at itsclosed end a suitable aperture 6, through which the ring 0 is passedtenon foremost, until the flange a strikes the inner face of the SerialNo. 514,862. (No model.)

yoke. The ring is then closed in as indicated by the dotted lines, untilthe tenon d has passed into the socket c, the toe or end portion of thetenon filling the socket to (30111- plete the circumference of the neckI), the outer face of its extremity resting against the wall of theaperture, thus securing the-ring permanently in the aperture, andagainst opening or removal, by the ordinary lifting strain on the ring.

The object of my invention which has been thus clearly shown anddescribed, is to provide at a greatly reduced cost, a strong and durablesingle block for hoisting tackle, and

' What I claim is' The combination, with the sheave frame having anopening, of a malleable ring having a short-headed neck at one endprovided in its inner beveled face with a socket opening upwardly intothe ring; the opposite beveled end face of the ring being formed with atenon projecting outwardly beyond the outer face of the ring proper,whereby when the ring is inserted upwardly through the sheave openingits head will engage the frame, and upon the ring being closed thebeveled end faces will abut and the tenon be forced downwardly into saidneck socket and Within the sheave frame opening, substantially fill saidopening and be held permanently from outward movement by the wall ofsaid opening, substantially as described.

In testimony whereof I have hereunto set my-hand this 9th day of June,A. D. 1894.

JUDSON D. SWA CIOK.

Witnesses:

. LAURA 0. BROWN,

FRANK W. MILLER.

